Just before the summer holiday, while his classmate is excited to have a girlfriend, Tomorou has none. He is smart and handsome but lacks something. He has an old friend, Chiharu, but he isn't interested in her. One day, Chiharu's mother asks Tomorou to hand over a shopping list memo to Chiharu because she left it at home. After school, he goes to her classroom but Chiharu isn't there. According to her classmate, she is on the roof. He goes there and see Chiharu having sex with other students. Chiharu invites Tomorou to join them, and so his sex life starts... [Edited from Himeya Shop]
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| Name | Characters | Importance | Weight |
|---|---|---|---|
| Sex with Others Engages in (Sexual) | 5 | 1.99 | 3.56 |
| Casual Sex Engages in (Sexual) | 3 | 2.44 | 3.39 |
| Off Screen Sex (obsolete) Engages in (Sexual) | 3 | 2.29 | 3.17 |
| Kid Body | 9 | 1.36 | 3.13 |
| New Type School Swimsuit Clothes | 2 | 2.51 | 2.76 |
| Group Sex Engages in (Sexual) | 5 | 1.45 | 2.59 |
| String Ribbon Tie Clothes | 3 | 1.81 | 2.51 |
| Promiscuous Personality | 2 | 2.26 | 2.48 |
| Sex in Public Places Engages in (Sexual) | 6 | 1.26 | 2.46 |
| School Swimming Club President Role | 1 | 3.46 | 2.40 |
| Voyeurism Engages in (Sexual) | 2 | 2.17 | 2.39 |
| Black Eyes | 4 | 1.43 | 2.30 |
| Pleated Skirt Clothes | 4 | 1.41 | 2.28 |
| Sex in a Vehicle Engages in (Sexual) | 2 | 2.05 | 2.26 |
| Naked Clothes | 2 | 1.95 | 2.14 |
| Library Committee Member Role | 1 | 2.91 | 2.02 |
| Sitting Sex Engages in (Sexual) | 2 | 1.83 | 2.01 |
| Handjob Subject of (Sexual) | 2 | 1.76 | 1.93 |
| Missionary Engages in (Sexual) | 2 | 1.75 | 1.92 |
| PE Teacher Role | 1 | 2.75 | 1.91 |
| Brown Eyes | 7 | 0.90 | 1.87 |
| Consensual Group Sex of One Female and Several Males Engages in (Sexual) | 1 | 2.54 | 1.76 |
| Sex with Children Engages in (Sexual) | 1 | 2.52 | 1.74 |
| Parted in Middle Hair | 3 | 1.25 | 1.74 |
| Classmate Role | 3 | 1.23 | 1.70 |
| Masturbation with Object Engages in (Sexual) | 1 | 2.44 | 1.69 |
| Blowjob Subject of (Sexual) | 2 | 1.53 | 1.68 |
| Sex in Front of an Audience Engages in (Sexual) | 2 | 1.51 | 1.66 |
| Reverse Missionary Engages in (Sexual) | 1 | 2.38 | 1.65 |
| Ball-cupping Engages in (Sexual) | 1 | 2.36 | 1.63 |
| Outdoor Sex Engages in (Sexual) | 3 | 1.16 | 1.60 |
| Not a Virgin Role | 2 | 1.45 | 1.59 |
| Tanline Body | 1 | 2.28 | 1.58 |
| Class President Role | 1 | 2.27 | 1.58 |
| Loner Personality | 1 | 2.26 | 1.57 |
| Reverse Cowgirl Engages in (Sexual) | 1 | 2.24 | 1.56 |
| Hair Tie Clothes | 2 | 1.41 | 1.55 |
| Micro Bikini Clothes | 1 | 2.22 | 1.54 |
| Seduction Engages in | 1 | 2.20 | 1.52 |
| Tareme Eyes | 3 | 1.09 | 1.52 |
| Freckles Body | 1 | 2.10 | 1.45 |
| T-shirt Clothes | 2 | 1.32 | 1.45 |
| Butterfly Engages in (Sexual) | 1 | 2.04 | 1.41 |
| Brown Hair | 7 | 0.68 | 1.41 |
| Transfer Student Role | 1 | 2.01 | 1.39 |
| Voyeurism Subject of | 1 | 1.99 | 1.38 |
| Neighbor Role | 1 | 1.99 | 1.38 |
| Slim Body | 10 | 0.57 | 1.37 |
| Assertive Personality | 1 | 1.96 | 1.36 |
| Vaginal Gaping Engages in (Sexual) | 1 | 1.96 | 1.36 |
| Group Sex of Multiple Females and Males Engages in (Sexual) | 1 | 1.94 | 1.34 |
| Friend Role | 2 | 1.21 | 1.33 |
| Masturbation in front of an Audience Engages in (Sexual) | 1 | 1.92 | 1.33 |
| Antenna Hair | 1 | 1.92 | 1.33 |
| Quickie Fix Engages in (Sexual) | 1 | 1.89 | 1.31 |
| Standing Sex Engages in (Sexual) | 1 | 1.88 | 1.31 |
| Black Hair | 4 | 0.81 | 1.30 |
| Timid Personality | 1 | 1.87 | 1.30 |
| Butterfly Subject of (Sexual) | 2 | 1.17 | 1.29 |
| Doggy Style Subject of (Sexual) | 3 | 0.92 | 1.28 |
| Handjob Engages in (Sexual) | 2 | 1.16 | 1.27 |
| Boku Personality | 1 | 1.79 | 1.24 |
| Anal Sex Engages in (Sexual) | 1 | 1.77 | 1.23 |
| Missionary Subject of (Sexual) | 2 | 1.11 | 1.22 |
| Side Tail Hair | 1 | 1.74 | 1.21 |
| Reverse Missionary Subject of (Sexual) | 1 | 1.73 | 1.20 |
| Sports Shoes Clothes | 1 | 1.73 | 1.20 |
| Reserved Personality | 1 | 1.73 | 1.20 |
| Cowgirl Engages in (Sexual) | 1 | 1.72 | 1.19 |
| Nipple Sucking Engages in (Sexual) | 1 | 1.71 | 1.19 |
| Vaginal Fingering Subject of (Sexual) | 2 | 1.08 | 1.18 |
| Quickie Fix Subject of (Sexual) | 2 | 1.08 | 1.18 |
| Short Hair | 6 | 0.61 | 1.18 |
| Doggy Style Engages in (Sexual) | 1 | 1.70 | 1.18 |
| Parted to Side Hair | 2 | 1.07 | 1.17 |
| Vaginal/Anal Sexual Toys Subject of (Sexual) | 1 | 1.65 | 1.14 |
| Sweater Clothes | 1 | 1.64 | 1.14 |
| Popular Role | 1 | 1.64 | 1.13 |
| Sex in Classroom Engages in (Sexual) | 1 | 1.61 | 1.12 |
| Nipple Teasing Subject of (Sexual) | 1 | 1.59 | 1.10 |
| Cunnilingus Engages in (Sexual) | 1 | 1.56 | 1.08 |
| Sex in Water Engages in (Sexual) | 1 | 1.56 | 1.08 |
| Sidehair Hair | 2 | 0.98 | 1.07 |
| Cowgirl Subject of (Sexual) | 2 | 0.95 | 1.05 |
| Student Role | 1 | 1.48 | 1.03 |
| Blunt Bangs Hair | 1 | 1.40 | 0.97 |
| Hairpin Clothes | 1 | 1.39 | 0.97 |
| Female Ejaculation Engages in (Sexual) | 1 | 1.38 | 0.96 |
| Masturbation Engages in (Sexual) | 1 | 1.37 | 0.95 |
| Wavy Hair | 1 | 1.36 | 0.94 |
| Virgin Sex Engages in (Sexual) | 2 | 0.84 | 0.93 |
| Watashi Personality | 1 | 1.26 | 0.88 |
| Childhood Friend Role | 1 | 1.25 | 0.87 |
| Pale Body | 9 | 0.37 | 0.86 |
| Friendly Personality | 1 | 1.23 | 0.85 |
| Blowjob Engages in (Sexual) | 2 | 0.76 | 0.84 |
| Long Hair | 2 | 0.75 | 0.83 |
| Anal Sex Subject of (Sexual) | 1 | 1.19 | 0.82 |
| Standing Sex Subject of (Sexual) | 1 | 1.18 | 0.82 |
| Cunnilingus Subject of (Sexual) | 1 | 1.17 | 0.81 |
| Twin Tails Hair | 1 | 1.12 | 0.78 |
| Ponytail Hair | 1 | 1.10 | 0.76 |
| Glasses Clothes | 1 | 1.08 | 0.75 |
| Sitting Sex Subject of (Sexual) | 1 | 1.05 | 0.73 |
| Kind Personality | 1 | 1.04 | 0.72 |
| Thigh-high Stockings Clothes | 1 | 1.03 | 0.72 |
| Spiky Bangs Hair | 1 | 1.01 | 0.70 |
| Shoulder-length Hair | 1 | 0.91 | 0.63 |
| Young-adult Body | 1 | 0.77 | 0.53 |
| Teen Body | 1 | 0.61 | 0.43 |